Industry-leading casting solutions for rail, petroleum, and machinery sectors.
The global rail transportation market is shifting towards high-speed, heavy-haul, and urban transit systems. This requires investment casting components with superior fatigue resistance and tight tolerances to ensure passenger safety and operational efficiency.
We utilize specialized alloy steels and stainless steels (including 304 and 4140) to combat the extreme environmental stressors found in railway infrastructure, from sub-zero temperatures to high-impact braking forces.
Our "Lost Wax" process achieves near-net-shape components, reducing the need for extensive machining and ensuring that complex geometric designs for modern rail systems are met with 100% accuracy.
Founded in 2014 and located in Weifang, Shandong, JUNLONG Machinery Co., Ltd. covers 60,000 square meters with an annual production capacity of 20,000 tons. We are a high-quality casting supplier integrating precision casting and deep processing, specializing in carbon steel, alloy steel, and stainless steel.
Our technology roadmap includes the integration of AI-driven solidification simulation software. By creating a digital twin of the mold, we can predict shrinkage and porosity before the first drop of metal is poured, ensuring 99.9% yield rates for complex railway components like bogie frames and coupler knuckles.
Environmental compliance is at our core. We are upgrading to closed-loop sand reclamation and energy-efficient induction furnaces to reduce our carbon footprint, aligning with the global rail industry's push for sustainable supply chains.
Our railway components are engineered for diverse environments and specific mechanical requirements:
Precision-cast calipers and brackets designed to withstand rapid thermal expansion and friction-induced vibration.
High-load-bearing alloy steel castings that support the weight of transcontinental freight containers across North America and Asia.
Compact, durable stainless steel components that provide smooth operation and low maintenance for city transit systems.
Reliability in the rail industry is non-negotiable. JUNLONG has obtained ISO 9001, TS 16949, and UL certifications. Every batch undergoes rigorous physical and chemical analysis, including ultrasonic and magnetic particle inspection, ensuring we meet the highest safety standards of Germany, the USA, and Italy.
Investing in technology to provide Information Gain and manufacturing excellence.
The railway sector is unique due to its lifecycle expectations. Components are expected to last 30+ years under constant mechanical stress. Traditional sand casting often falls short in terms of surface finish and internal integrity. Investment casting, or lost wax casting, allows for the production of components with thinner walls and more intricate internal cooling channels or attachment points without sacrificing structural strength.
At JUNLONG, our expertise in alloy steel investment casting addresses the critical "toughness vs. hardness" dilemma. For railway applications, a part must be hard enough to resist wear from rail contact but tough enough to not shatter under impact. Through precision heat treatment processes, we achieve a homogenized grain structure that is superior to forged alternatives in cost-efficiency for complex shapes.
Furthermore, our integrated manufacturing approach (from mold design to CNC machining) provides significant Information Gain for our clients. We don't just supply a part; we provide the metallurgical data, the stress-test results, and the dimensional verification that proves the part will exceed its service life.
Global supply for automotive, agriculture, and construction.
Depending on the application, we recommend high-strength alloy steels for structural parts and stainless steels (like 304 or 316L) for components exposed to corrosive environments. For heavy-haul systems, material grade 4140 is common due to its excellent fatigue life.
We implement a multi-stage quality control process including spectrometer analysis of every heat, X-ray inspection for internal flaws, and MPI (Magnetic Particle Inspection) for surface cracks. Our adherence to TS 16949 standards ensures process stability.
Yes, we export to Germany, the USA, and Italy. We provide full technical documentation in English/local languages and can align our production with local rail standards such as AAR (Association of American Railroads) or UIC (International Union of Railways).
Using our automated mold manufacturing and rapid wax pattern tools, we can typically deliver initial samples for evaluation within 4-6 weeks, depending on the complexity of the design.
Join global industry leaders and benefit from our 20,000-ton annual capacity and engineering expertise.
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